var valor='df';
var cont=0;

function mostrar_modelo(col)
{ 

    if(col==1){  	
         document.getElementById('col1').style.visibility = "visible";
		 document.getElementById('col2').style.visibility = "hidden";
		 document.getElementById('col3').style.visibility = "hidden";

    }



    if(col==2){	       
		 document.getElementById('col1').style.visibility = "visible";
         document.getElementById('col2').style.visibility = "visible";
		 document.getElementById('col3').style.visibility = "visible";

    }
    
    if(col==3){
	        document.getElementById('col1').style.visibility = "visible";
            document.getElementById('col2').style.visibility = "visible";
		    document.getElementById('col3').style.visibility = "hidden";
    }


}


function inicial()
{
	mostrar_modelo(1);
} 


window.onload = inicial;